单项选择题

This experiment ought to ______ last week.

A．be done
B．have been done
C．have done
D．do
<上一题 目录 下一题>
热门 试题

单项选择题
Cars and motorcycles are similar ______ they are both privately owned means of transport.
A．so that
B．in that
C．for that
D．in which
单项选择题
My car broke ______ on the way to work so I was late.
A．up
B．down
C．off
D．into
相关试题